Information transmission method and device

ABSTRACT

Provided are an information transmission method and device. The method includes: receiving, by a terminal device, a first synchronization signal block sent by a network device; and obtaining, by the terminal device, resource information of a second synchronization signal block based on the second information if the first information indicates that RMSI is not present, where the first synchronization signal block comprises a first physical broadcast channel (PBCH), and information carried on the first PBCH comprises first information and second information. The first information is used for indicating whether remaining minimum system information (RMSI) is present, and when the first information indicates that RMSI is not present, the second information is used for indicating resource information of a second synchronization signal block.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/860,981 filed on Apr. 28, 2020, which is a continuation of and claimspriority to International Patent Application No. PCT/CN2017/108916 filedon Nov. 1, 2017. The contents of these applications are herebyincorporated by reference in their entirety.

BACKGROUND

In a 5G new radio (New Radio, NR) system, when a terminal device needsto access a network, the terminal device needs to obtain systeminformation from the network. Specifically, some system information maybe obtained through a physical broadcast channel (Physical BroadcastChannel, PBCH, or NR-PBCH), and remaining minimum system information(Remaining Minimum System Information, RMSI) may further be obtainedthrough a physical downlink shared channel (Physical Downlink SharedChannel, PDSCH, or NR-PDSCH). Downlink control information (DownlinkControl Information, DCI) corresponding to the NR-PDSCH is carried on aphysical downlink control channel (Physical Downlink Control Channel,PDCCH, or NR-PDCCH). A time-frequency resource location of the NR-PDCCHis indicated based on (Control Resource Set, CORESET) informationcarried on the NR-PBCH. The NR-PBCH may further carry indicationinformation for indicating whether a synchronization signal block(Synchronization Signal block, SS block) corresponding to the NR-PBCH isassociated with the RMSI. If the indication information indicates thatthe SS block is not associated with the RMSI, the terminal device doesnot need to receive corresponding RMSI. However, the terminal deviceneeds to blindly detect other SS blocks to obtain RMSI, increasingcomplexity of SS block detection by the terminal device.

SUMMARY

Embodiments of this application relate to the communications field, andmore specifically, to an information transmission method and device,helping reduce complexity of SS block detection by a terminal device.

According to a first aspect, an information transmission method isprovided, and includes receiving, by a terminal device, a firstsynchronization signal block sent by a network device, where the firstsynchronization signal block includes a first physical broadcast channelPBCH, and information carried on the first PBCH includes firstinformation and second information; and obtaining, by the terminaldevice, resource information of a second synchronization signal blockfrom the second information if the first information indicates that RMSIis not present, where the first information is used for indicatingwhether RMSI is present, and when the first information indicates thatRMSI is not present, the second information is used for indicating theresource information of the second synchronization signal block.

According to a second aspect, an information transmission method isprovided, and includes: determining, by a network device, that RMSI isnot present; and sending, by the network device, a first synchronizationsignal block to a terminal device, where the first synchronizationsignal block includes a first physical broadcast channel PBCH,information carried on the first PBCH includes first information andsecond information, the first information is used to indicate that RMSIis not present, and the second information is used to indicate resourceinformation of a second synchronization signal block, where the resourceinformation of the second synchronization signal block is obtained basedon the second information if the first information indicates that RMSIis not present.

According to a third aspect, an information transmission device isprovided. The device includes a memory, a processor, an input interface,and an output interface. The memory, the processor, the input interface,and the output interface are connected based on a bus system. The memoryis configured to store instructions. The processor is configured toexecute the instructions stored in the memory, and configured to performthe method according to the first aspect or any possible implementationof the first aspect.

According to a fourth aspect, an information transmission device isprovided. The device includes a memory, a processor, an input interface,and an output interface. The memory, the processor, the input interface,and the output interface are connected based on a bus system. The memoryis configured to store instructions. The processor is configured toexecute the instructions stored in the memory, and configured to performthe method according to the second aspect or any possible implementationof the second aspect.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of an application scenario according to anembodiment of this application;

FIG. 2 is a schematic flowchart of an information transmission methodaccording to an embodiment of this application;

FIG. 3 is a schematic flowchart of an information transmission methodaccording to another embodiment of this application;

FIG. 4 is a schematic block diagram of an information transmissiondevice according to an embodiment of this application;

FIG. 5 is a schematic block diagram of an information transmissiondevice according to another embodiment of this application;

FIG. 6 is a schematic block diagram of an information transmissiondevice according to an embodiment of this application; and

FIG. 7 is a schematic block diagram of an information transmissiondevice according to another embodiment of this application

DETAILED DESCRIPTION

The following describes technical solutions of embodiments of thisapplication with reference to accompanying drawings.

The technical solutions in the embodiments of this application may beapplied to various communications systems, such as a Global System forMobile Communications (GSM) system, a Code Division Multiple Access(CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system,a general packet radio service (GPRS), a Long Term Evolution (LTE)system, an LTE frequency division duplex (FDD) system, LTE time divisionduplex (TDD), Universal Mobile Telecommunications System (UMTS), aWorldwide Interoperability for Microwave Access (WiMAX) communicationssystem, or a future 5G system.

FIG. 1 shows a wireless communications system 100 to which theembodiments of this application are applied. The wireless communicationssystem 100 may include a network device 110. The network device 110 maybe a device that can communicate with a terminal device. The networkdevice 110 may provide communication coverage for a specificgeographical region, and may communicate with a terminal device (forexample, UE) located within the coverage area. Optionally, the networkdevice 110 may be a base transceiver station (BTS) in a GSM system orCDMA system, a NodeB (NB) in a WCDMA system, an evolved NodeB (eNB oreNodeB) in an LTE system, or a wireless controller in a cloud radioaccess network (CRAN), or the network device may be a relay station, anaccess point, an in-vehicle device, a wearable device, a network sidedevice in a future 5G network, a network device in an evolved publicland mobile network (PLMN), or the like.

The wireless communications system 100 further includes at least oneterminal device 120 located within a coverage range of the networkdevice 110. The terminal device 120 may be mobile or fixed. Optionally,the terminal device 120 may be an access terminal, user equipment (UE),a subscriber unit, a subscriber station, a mobile station, a mobileconsole, a remote station, a remote terminal, a mobile device, a userterminal, a terminal, a wireless communications device, a user agent, ora user apparatus. The access terminal may be a cellular phone, acordless phone, a session initiation protocol (SIP) phone, a wirelesslocal loop (WLL) station, a personal digital assistant (PDA), a handhelddevice having a wireless communication function, a computing device,another processing device connected to a wireless modem, an in-vehicledevice, a wearable device, a terminal device in a future 5G network, aterminal device in a future evolved PLMN, or the like.

It should be noted that in a 5G NR system, a PBCH may also be referredto as an NR-PBCH, a PDCCH may also be referred to as an NR-PDCCH, and aPDSCH may also be referred to as an NR-PDSCH. That is, in the 5G NRsystem, the foregoing concepts may be used exchangeably.

In the 5G NR system, a public channel (for example, a broadcast channel)and a synchronization signal may cover an entire cell through multi-beamscanning, so that a terminal device in the cell performs receiving.Multi-beam sending of a synchronization signal may be implemented basedon a synchronization signal burst set (SS burst set). For example, oneSS burst set may include one or more SS bursts, one SS burst may includeone or more SS blocks, and one SS block may be used to carry asynchronization signal and a broadcast channel of one beam. For example,one SS block includes a one-symbol primary synchronization signal (PSS),a one-symbol secondary synchronization signal (SSS), and a two-symbolPBCH.

Specifically, the PBCH may be used to carry CORESET information, wherethe CORESET information indicates a resource set carrying controlinformation for receiving RMSI. That is, resources on which a controlchannel is detected or on which control information is obtained may belearned of based on the CORESET information. For example, the CORESETinformation may include the following information: a frequency domainresource, a starting orthogonal frequency division multiplexing (OFDM)symbol, a time length, and the like.

The PBCH may be further used to carry indication information, where theindication information may be used to indicate whether the SS block isassociated with sending of RMSI, or, the indication information may beused to indicate whether RMSI exists. The indication information may be1-bit indication information. When no RMSI exists, because the terminaldevice does not obtain RMSI in this case, the terminal device does notknow resource information of other SS blocks. Therefore, the terminaldevice needs to blindly detect other SS blocks to obtain RMSI, to accessa network. This increases power consumption and an access delay of theterminal device.

Specifically, the RMSI may be carried on the PDSCH. The terminal devicemay receive DCI carried in the PDCCH, obtain scheduling information ofthe PDSCH according to the DCI, and receive the PDSCH based on thescheduling information of the PDSCH, to obtain the RMSI. Informationabout a resource set carrying the PDCCH may be indicated based on theCORESET information carried in the PBCH. After obtaining the CORESETinformation, the terminal device may detect the PDCCH in the resourceset indicated by the CORESET downlink, to obtain the DCI.

FIG. 2 is a schematic flowchart of an information transmission method200 according to an embodiment of this application. The method 200 maybe performed by the terminal device in the communications system 100shown in FIG. 1 . As shown in FIG. 2 , the method 200 may include thefollowing content:

S210. The terminal device receives a first synchronization signal blocksent by a network device, where the first synchronization signal blockincludes a first physical broadcast channel PBCH, and informationcarried on the first PBCH includes first information and secondinformation.

S220. The terminal device obtains resource information of a secondsynchronization signal block from the second information if the firstinformation indicates that no remaining minimum system information RMSIexists.

Specifically, the terminal device may receive the first synchronizationsignal block, where the first synchronization signal block may includethe first PBCH. Optionally, the first synchronization signal block mayfurther include a PSS, an SSS, and the like. The information carried onthe first PBCH may include the first information and the secondinformation, and the first information may be used to indicate whetherRMSI exists. Optionally, if the first information is used to indicatethat no RMSI exists, the second information may be used to indicate theresource information of the second synchronization signal block.Alternatively, if the first information is used to indicate that RMSIexists, the second information may be used to indicate a resource setcarrying control information for receiving the RMSI.

In this embodiment of this application, of the first informationindicates that no RMSI exists, the terminal device may obtain theresource information of the second synchronization signal block from thesecond information carried on the PBCH, and then may receive the secondsynchronization signal block according to the resource information ofthe second synchronization signal block.

Therefore, in the information transmission method in this embodiment ofthis application, the terminal device may obtain the resourceinformation of the second synchronization signal block based on thesecond information carried on the first PBCH when the first informationcarried on the first PBCH indicates that no RMSI exists, and further mayreceive the second synchronization signal block according to theresource information of the second synchronization signal block, therebyreducing complexity of blindly detecting other synchronization signalblocks by the terminal device. This helps reduce power consumption andan access delay of the terminal device.

Optionally, in some embodiments, the method 200 may further include:receiving, by the terminal device, the second synchronization signalblock according to the resource information of the secondsynchronization signal block, where the second synchronization signalblock includes a second physical broadcast channel PBCH, informationcarried on the second PBCH includes third information and fourthinformation, the third information indicates that RMSI exists, and thefourth information indicates a resource set carrying control informationfor receiving the RMSI.

Specifically, after learning of the resource information of the secondsynchronization signal block according to the second information, theterminal device may receive the second synchronization signal block on aresource location indicated by the resource information of the secondsynchronization signal block, and obtain the carried third informationand fourth information from the second PBCH included in the secondsynchronization signal block, and further, in case that the thirdinformation indicates that RMSI exists, may obtain the RMSI according tothe fourth information.

Optionally, in some embodiments, the obtaining, by the terminal device,the RMSI according to the fourth information includes: detecting aphysical downlink control channel PDCCH according to the resource setindicated by the fourth information, and obtaining schedulinginformation of a physical downlink shared channel PDSCH; and obtaining,according to the scheduling information of the PDSCH, RMSI carried onthe PDSCH.

Specifically, in case that the third information indicates that the RMSIexists, the fourth information may indicate the resource set carryingthe control information for receiving the RMSI. That is, according tothe fourth information, the resource set carrying the controlinformation related to the RMSI may be obtained. That is, the PDCCH maybe detected on the resource set indicated by the fourth information, toobtain the scheduling information of the PDSCH carrying the RMSI.Further, the PDSCH may be detected according to the schedulinginformation of the PDSCH, to obtain the RMSI carried on the PDSCH. Then,a network may be accessed according to system information such as theRMSI.

Therefore, in the information transmission method in this embodiment ofthis application, the terminal device may obtain the resourceinformation of the second synchronization signal block based on thesecond information carried on the first PBCH, and then may receive thesecond synchronization signal block according to the resourceinformation of the second synchronization signal block, to obtain thethird information and the fourth information included in the secondPBCH, where the third information is used to indicate that the RMSIexists, and the fourth information indicates the resource set carryingthe control information for receiving the RMSI. In this way, theterminal device may obtain the RMSI according to the fourth information,thereby reducing complexity of blindly detecting other synchronizationsignal blocks by the terminal device, and further reducing powerconsumption and an access delay of the terminal device.

It should be noted that the terminal device may further obtain resourceinformation of more synchronization signal blocks from the secondinformation, for example, may obtain resource information of a thirdsynchronization signal block and a fourth synchronization signal blockfrom the second information. This embodiment of this application isdescribed only based on an example in which the resource information ofthe second synchronization signal block is obtained from the secondinformation, and this embodiment of this application is not limitedthereto.

It should be understood that, in this embodiment of this application,the first information may be used to indicate whether the RMSI exists,or the first information may be used to indicate whether the firstsynchronization signal block is associated with sending of the RMSI.Similarly, the third information may also be used to indicate whetherthe RMSI exists, or the third information may be used to indicatewhether the second synchronization signal block is associated withsending of the RMSI. Optionally, bit fields for carrying the firstinformation and the third information may be a same bit field. In aspecific embodiment, the first information and the third information maycorrespond to the foregoing 1-bit indication information.

Optionally, in some embodiments, a first bit field for carrying thesecond information and a second bit field for carrying the fourthinformation at least partially overlap.

It should be understood that, this embodiment of this application doesnot particularly limit sizes of the first bit field and the second bitfield, for example, the first bit field may be greater than the secondbit field, or the second bit field may be greater than the first bitfield, or the first bit field may be equal to the second bit field,provided that the first bit field and the second bit field at leastpartially overlap.

That is, when indication information carried on a PBCH indicates thatRMSI exists, a second bit field in the PBCH may be used to carry aresource set of control information for receiving the RMSI. When theindication information carried on the PBCH indicates that no RMSIexists, the fourth information actually makes no sense. Therefore, thefourth information may not need to be carried still based on the secondbit field. Instead, a part or all of the second bit field may be used tocarry the second information. In other words, in different scenarios, aspecific bit field (namely, an overlapping part of the first bit fieldand the second bit field) in the PBCH may be reused to carry differentinformation, thereby reducing signaling overheads.

For example, if the first bit field for carrying the second informationis eight bits, the second bit field for carrying the fourth informationis ten bits, and start positions of the first bit field and the secondbit field are the same, the first bit field and the second bit fieldhave an overlapping area of eight bits. In case that the thirdinformation indicates that the RMSI exists, the second bit field may beused to carry the resource set of the control information for receivingthe RMSI. When the first information indicates that no RMSI exists, thefourth information actually makes no sense. Therefore, the fourthinformation may not need to be carried still based on the second bitfield. Instead, in this case, resource information of anothersynchronization signal block may be carried based on the first bitfield, thereby reducing signaling overheads.

Preferably, a same bit field may be reused for the first bit field andthe second bit field. That is, the first bit field and the second bitfield completely overlap.

Optionally, in some embodiments, the second bit field for carrying thefourth information may be an existing CORESET indication field, wherethe CORESET indication field may be used to carry CORESET information.That is, the terminal device may learn of, according to the CORESETinformation, resources on which a control channel is detected. In thiscase, the first bit field for carrying the second information mayinclude a part or all of the CORESET indication field.

To be specific, a part or all of the CORESET indication field carried onthe PBCH may be used to carry the second information. For example, whenthe first information carried on the first PBCH indicates that no RMSIexists, CORESET information carried in a CORESET indication field of thefirst PBCH actually makes no sense, in other words, there is no need tofill CORESET information in the CORESET indication field. In this case,the resource information of the second synchronization signal block maybe filled in a part or all of the CORESET indication field. In this way,the terminal device may detect the second synchronization signal blockaccording to the resource information of the second synchronizationsignal block that is filled in the CORESET indication field, therebyreducing complexity of detecting another SS block by the terminaldevice. In addition, resource information of another synchronizationsignal block is carried in the existing CORESET indication field,thereby being better compatible with the prior art, and helping reducesignaling overheads.

Optionally, in this embodiment of this application, the resourceinformation of the second synchronization signal block may includeinformation about a time domain resource and/or information about afrequency domain resource of the second synchronization signal block.

For example, the information about the frequency domain resource of thesecond synchronization signal block may be frequency-domain resourceposition information of the second synchronization signal block or maybe offset information of a frequency domain position of the secondsynchronization signal block relative to that of the firstsynchronization signal block.

Optionally, in some embodiments, the RMSI includes at least one of thefollowing: a paging configuration parameter, cell selection information,and access control information.

That is, the RMSI may be used by the terminal device to access anetwork.

The information transmission method according to this embodiment of thisapplication is described from the perspective of the terminal devicewith reference to FIG. 2 , and an information transmission methodaccording to an embodiment of this application is described from theperspective of a network device with reference to FIG. 3 . It should beunderstood that, descriptions on a side of the network device correspondto descriptions on a side of the terminal device. For similardescriptions, refer to the foregoing descriptions. To avoid repetition,details are not described herein again.

FIG. 3 is a schematic flowchart of an information transmission method300 according to another embodiment of this application. The method 300may be performed by the network device in the communications systemshown in FIG. 1 . As shown in FIG. 3 , the method 300 may include thefollowing content:

S310. A network device determines that no remaining minimum systeminformation RMSI exists.

S320. The network device sends a first synchronization signal block to aterminal device, where the first synchronization signal block includes afirst physical broadcast channel PBCH, information carried on the firstPBCH includes first information and second information, the firstinformation is used to indicate that no RMSI exists, and the secondinformation is used to indicate resource information of a secondsynchronization signal block.

Optionally, in some embodiments, the second synchronization signal blockincludes a second physical broadcast channel PBCH, information carriedon the second PBCH includes third information and fourth information,the third information indicates that RMSI exists, and the fourthinformation indicates a resource set carrying control information forreceiving the RMSI.

Optionally, in some embodiments, the resource information of the secondsynchronization signal block is frequency-domain resource positioninformation of the second synchronization signal block or offsetinformation of a frequency domain position of the second synchronizationsignal block relative to that of the first synchronization signal block.

Optionally, in some embodiments, a first bit field for carrying thesecond information and a second bit field for carrying the fourthinformation at least partially overlap.

Optionally, in some embodiments, the RMSI includes at least one of thefollowing: a paging configuration parameter, cell selection information,and access control information.

The method embodiments in this application are described above in detailwith reference to FIG. 2 and FIG. 3 , apparatus embodiments in thisapplication are described below in detail with reference to FIG. 4 toFIG. 7 . It should be understood that, the apparatus embodimentscorrespond to the method embodiments. For similar descriptions, refer tothe method embodiments.

FIG. 4 is a schematic block diagram of an information transmissiondevice according to an embodiment of this application. The device 400 inFIG. 4 includes: a communications module 410, configured to receive afirst synchronization signal block sent by a network device, where thefirst synchronization signal block includes a first physical broadcastchannel PBCH, and information carried on the first PBCH includes firstinformation and second information; and an obtaining module 420,configured to obtain resource information of a second synchronizationsignal block from the second information in case that the firstinformation indicates that no remaining minimum system information RMSIexists.

Optionally, in some embodiments, the communications module 410 may befurther configured to: receive the second synchronization signal blockaccording to the resource information of the second synchronizationsignal block, where the second synchronization signal block includes asecond physical broadcast channel PBCH, information carried on thesecond PBCH includes third information and fourth information, the thirdinformation indicates that RMSI exists, and the fourth informationindicates a resource set carrying control information for receiving theRMSI.

Optionally, in some embodiments, the obtaining module 420 may be furtherconfigured to: in case that the third information indicates that RMSIexists, obtain the RMSI according to the fourth information.

Optionally, in some embodiments, the obtaining module 420 may bespecifically configured to: detect a physical downlink control channelPDCCH according to the resource set indicated by the fourth information,and obtain scheduling information of a physical downlink shared channelPDSCH; and obtain, according to the scheduling information of the PDSCH,RMSI carried on the PDSCH.

Optionally, in some embodiments, the resource information of the secondsynchronization signal block is frequency-domain resource positioninformation of the second synchronization signal block or offsetinformation of a frequency domain position of the second synchronizationsignal block relative to that of the first synchronization signal block.

Optionally, in some embodiments, a first bit field for carrying thesecond information and a second bit field for carrying the fourthinformation at least partially overlap.

Optionally, in some embodiments, the RMSI includes at least one of thefollowing: a paging configuration parameter, cell selection information,and access control information.

Specifically, the device 400 may correspond to (for example, may beconfigured as or may itself be) the terminal device described in themethod 200. In addition, various modules or units of the device 400 areseparately configured to perform various actions or processing processesperformed by the terminal device in the method 200. Herein, to avoidrepetition, detailed descriptions are omitted.

FIG. 5 is a schematic block diagram of an information transmissiondevice according to an embodiment of this application. The device 500 inFIG. 5 includes: a determining module 510, configured to determine thatno remaining minimum system information RMSI exists; and acommunications module 520, configured to send a first synchronizationsignal block to a terminal device, where the first synchronizationsignal block includes a first physical broadcast channel PBCH,information carried on the first PBCH includes first information andsecond information, the first information is used to indicate that noRMSI exists, and the second information is used to indicate resourceinformation of a second synchronization signal block.

Optionally, in some embodiments, the second synchronization signal blockincludes a second physical broadcast channel PBCH, information carriedon the second PBCH includes third information and fourth information,the third information indicates that RMSI exists, and the fourthinformation indicates a resource set carrying control information forreceiving the RMSI.

Optionally, in some embodiments, the resource information of the secondsynchronization signal block is frequency-domain resource positioninformation of the second synchronization signal block or offsetinformation of a frequency domain position of the second synchronizationsignal block relative to that of the first synchronization signal block.

Optionally, in some embodiments, a first bit field for carrying thesecond information and a second bit field for carrying the fourthinformation at least partially overlap.

Optionally, in some embodiments, the RMSI includes at least one of thefollowing: a paging configuration parameter, cell selection information,and access control information.

Specifically, the device 500 may correspond to (for example, may beconfigured as or may itself be) the network device described in themethod 300. In addition, various modules or units of the device 500 areseparately configured to perform various actions or processing processesperformed by the network device in the method 300. Herein, to avoidrepetition, detailed descriptions are omitted.

As shown in FIG. 6 , an embodiment of this application further providesan information transmission device 600. The device 600 may be the device400 in FIG. 4 , and can be configured to execute content of the terminaldevice corresponding to the method 200 in FIG. 2 . The device 600includes an input interface 610, an output interface 620, a processor630, and a memory 640. The input interface 610, the output interface620, the processor 630, and the memory 640 may be connected based on abus system. The memory 640 is configured to store a program, aninstruction, or code. The processor 630 is configured to execute theprogram, the instruction, or the code in the memory 640 to: control theinput interface 610 to receive a signal, control the output interface620 to send a signal, and complete operations in the foregoing methodembodiment.

It should be understood that in this embodiment of this application, theprocessor 630 may be a central processing unit (CPU), or the processor630 may be another general-purpose processor, a digital signal processor(DSP), an application-specific integrated circuit (ASIC), afield-programmable gate array (FPGA), another programmable logic device,a discrete gate or a transistor logic device, a discrete hardwarecomponent, or the like. The general-purpose processor may be amicroprocessor, or the processor may be any conventional processor orthe like.

The memory 640 may include a read-only memory and a random accessmemory, and provide an instruction and data to the processor 630. A partof the memory 640 may further include a non-volatile random accessmemory. For example, the memory 640 may further store information abouta device type.

In an implementation process, content in the foregoing method may becompleted based on an integrated logical circuit of hardware in theprocessor 630 or instructions in a form of software in the processor630. The content of the methods disclosed with reference to theembodiments of this application may be directly performed and completedby a hardware processor, or may be performed and completed based on acombination of hardware and software modules in the processor. Thesoftware module may be located in a mature storage medium in the art,such as a random access memory, a flash memory, a read-only memory, aprogrammable read-only memory, an electrically-erasable programmablememory, or a register. The storage medium is located in the memory 640,and the processor 630 reads information in the memory 640 and completesthe content in the foregoing method in combination with hardware of theprocessor. To avoid repetition, details are not described herein again.

In a specific implementation, the obtaining module 420 included in thedevice 400 in FIG. 4 may be implemented by the processor 630 in FIG. 6 ,and the communications module 410 included in the device 400 in FIG. 4may be implemented by the input interface 610 and the output interface620 in FIG. 6 .

As shown in FIG. 7 , an embodiment of this application further providesan information transmission device 700. The device 700 may be the device500 in FIG. 5 , and can be configured to execute content of the networkdevice corresponding to the method 300 in FIG. 3 . The device 700includes an input interface 710, an output interface 720, a processor730, and a memory 740. The input interface 710, the output interface720, the processor 730, and the memory 740 may be connected based on abus system. The memory 740 is configured to store a program, aninstruction, or code. The processor 730 is configured to execute theprogram, the instruction, or the code in the memory 740 to: control theinput interface 710 to receive a signal, control the output interface720 to send a signal, and complete operations in the foregoing methodembodiment.

It should be understood that in this embodiment of this application, theprocessor 730 may be a central processing unit (CPU), or the processor730 may be another general-purpose processor, a digital signal processor(DSP), an application-specific integrated circuit (ASIC), afield-programmable gate array (FPGA), another programmable logic device,a discrete gate or a transistor logic device, a discrete hardwarecomponent, or the like. The general-purpose processor may be amicroprocessor, or the processor may be any conventional processor orthe like.

The memory 740 may include a read-only memory and a random accessmemory, and provide an instruction and data to the processor 730. A partof the memory 740 may further include a non-volatile random accessmemory. For example, the memory 740 may further store information abouta device type.

In an implementation process, content in the foregoing method may becompleted based on an integrated logical circuit of hardware in theprocessor 730 or instructions in a form of software in the processor730. The content of the methods disclosed with reference to theembodiments of this application may be directly performed and completedby a hardware processor, or may be performed and completed based on acombination of hardware and software modules in the processor. Thesoftware module may be located in a mature storage medium in the art,such as a random access memory, a flash memory, a read-only memory, aprogrammable read-only memory, an electrically-erasable programmablememory, or a register. The storage medium is located in the memory 740,and the processor 730 reads information in the memory 740 and completesthe content in the foregoing method in combination with hardware of theprocessor. To avoid repetition, details are not described herein again.

In a specific implementation, the determining module 510 included in thedevice 500 in FIG. 5 may be implemented by the processor 730 in FIG. 7 ,and the communications module 520 included in the device 500 in FIG. 5may be implemented by the input interface 710 and the output interface720 in FIG. 7 .

An embodiment of this application further proposes a computer-readablestorage medium. The computer-readable storage medium stores one or moreprograms. The one or more programs include instructions. Theinstructions, when being executed by a portable electronic deviceincluding a plurality of application programs, can enable the portableelectronic device to perform the methods in the embodiments shown inFIG. 2 and FIG. 3 .

An embodiment of this application further proposes a computer program.The computer program includes instructions. When executed by a computer,the computer program enables the computer to perform a correspondingprocedure in the methods in the embodiments shown in FIG. 2 and FIG. 3 .

A person of ordinary skill in the art may be aware that, in combinationwith the examples described in the embodiments disclosed in thisspecification, units and algorithm steps may be implemented byelectronic hardware or a combination of computer software and electronichardware. Whether the functions are performed by hardware or softwaredepends on particular applications and design constraint conditions ofthe technical solutions. Persons skilled in the art may use differentmethods to implement the described functions for each particularapplication, but it should not be considered that the implementationgoes beyond the scope of this application.

It may be clearly understood by a person skilled in the art that, forthe purpose of convenient and brief description, for a detailed workingprocess of the foregoing system, apparatus, and unit, refer to acorresponding process in the foregoing method embodiment, and detailsare not described herein again.

In the several embodiments provided in this application, it should beunderstood that the disclosed system, apparatus, and method may beimplemented in other manners. For example, the described apparatusembodiments are merely examples. For example, the unit division ismerely logical function division. During actual implementation, theremay be another division manner. For example, a plurality of units orcomponents may be combined or integrated into another system, or somefeatures may be ignored or not performed. In addition, the displayed ordiscussed mutual couplings or direct couplings or communicationconnections may be implemented based on some interfaces. The indirectcouplings or communication connections between the apparatuses or unitsmay be implemented in electronic, mechanical, or other forms.

The units described as separate parts may or may not be physicallyseparate, and parts displayed as units may or may not be physical units,may be located in one position, or may be distributed on a plurality ofnetwork units. Some or all of the units may be selected based on actualrequirements to achieve the objectives of the solutions of theembodiments.

In addition, functional units in the embodiments of this application maybe integrated into one processing unit, or each of the units may existalone physically, or two or more units are integrated into one unit.

When the functions are implemented in the form of a software functionalunit and sold or used as an independent product, the functions may bestored in a computer-readable storage medium. Based on such anunderstanding, the technical solutions of this application essentially,or the part contributing to the prior art, or some of the technicalsolutions may be implemented in a form of a software product. Thesoftware product is stored in a storage medium, and includes severalinstructions for instructing a computer device (which may be a personalcomputer, a server, or a network device) to perform all or some of thesteps of the methods described in the embodiments of this application.The foregoing storage medium includes any medium that can store programcode, such as a USB flash drive, a removable hard disk, a read-onlymemory (ROM), a random access memory (RAM), a magnetic disk, or anoptical disc.

The foregoing descriptions are merely specific implementations of thisapplication, but are not intended to limit the protection scope of thisapplication. Any variation or replacement readily figured out by aperson skilled in the art within the technical scope disclosed in thisapplication shall fall within the protection scope of this application.Therefore, the protection scope of this application shall be subject tothe protection scope of the claims.

The invention claimed is:
 1. A method for transmitting information, themethod comprising: receiving, by a terminal device, a firstsynchronization signal block sent by a network device, wherein the firstsynchronization signal block comprises a first physical broadcastchannel (PBCH), and information carried on the first PBCH comprisesfirst information and second information; and obtaining, by the terminaldevice, resource information of a second synchronization signal blockbased on the second information if the first information indicates thatremaining minimum system information (RMSI) is not present, wherein thefirst information is used for indicating whether RMSI is present, andwhen the first information indicates that RMSI is not present, thesecond information is used for indicating the resource information ofthe second synchronization signal block.
 2. The method of claim 1,wherein the method further comprises: receiving, by the terminal device,the second synchronization signal block, wherein the secondsynchronization signal block comprises a second PBCH, informationcarried on the second PBCH comprises third information and fourthinformation; wherein the third information is used for indicatingwhether RMSI is present, and when the third information indicates thatRMSI is present, the fourth information is used for indicating aresource set carrying control information for receiving RMSI.
 3. Themethod of claim 2, wherein receiving, by the terminal device, the secondsynchronization signal block comprises: receiving, by the terminaldevice, the second synchronization signal block according to theresource information of the second synchronization signal block.
 4. Themethod of claim 2, wherein the first PBCH comprises a first field, thefirst field is used for carrying the second information; and, whereinthe second PBCH comprises a second field, the second field is the samefield as the first field, and the second field is used for carrying thefourth information.
 5. The method of claim 2, wherein the field in thefirst PBCH used for carrying the first information is the same field asthe field in the second PBCH used for carrying the third information. 6.The method of claim 5, wherein the method further comprises: if thethird information indicates that RMSI is present, obtaining, by theterminal device, RMSI according to the fourth information.
 7. The methodof claim 6, wherein obtaining, by the terminal device, RMSI according tothe fourth information comprises: obtaining, scheduling information of aphysical downlink shared channel (PDSCH), by monitoring a physicaldownlink control channel PDCCH according to the resource set indicatedby the fourth information; and obtaining, according to the schedulinginformation of the PDSCH, RMSI carried on the PDSCH.
 8. The method ofclaim 1, wherein the resource information of the second synchronizationsignal block is frequency resource location information of the secondsynchronization signal block or frequency location offset informationbetween the second synchronization signal block and the firstsynchronization signal block.
 9. The method of claim 1, wherein the RMSIcomprises at least one of the following: a paging configurationparameter, cell selection information, or access control information.10. A method of transmitting information, the method comprising:sending, by a network device, a first synchronization signal block to aterminal device, wherein the first synchronization signal blockcomprises a first physical broadcast channel (PBCH), and informationcarried on the first PBCH comprises first information and secondinformation; wherein the first information is used for indicatingwhether remaining minimum system information (RMSI) is present, and whenthe first information indicates that RMSI is not present, the secondinformation is used for indicating resource information of a secondsynchronization signal block.
 11. The method of claim 10, wherein thesecond synchronization signal block comprises a second PBCH, informationcarried on the second PBCH comprises third information and fourthinformation, the third information is used for indicating whether RMSIis present, and when the third information indicates that RMSI ispresent, the fourth information is used for indicating a resource setcarrying control information for receiving RMSI.
 12. The method of claim11, wherein the first PBCH comprises a first field, the first field isused for carrying the second information; and wherein the second PBCHcomprises a second field, the second field is the same field as thefirst field, and the second field is used for carrying the fourthinformation.
 13. The method of claim 10, wherein the resourceinformation of the second synchronization signal block is frequencyresource location information of the second synchronization signal blockor frequency location offset information between the secondsynchronization signal block and the first synchronization signal block.14. The method of claim 10, wherein the RMSI comprises at least one ofthe following: a paging configuration parameter, cell selectioninformation, or access control information.
 15. An informationtransmission device comprising: a memory configured to storecomputer-executable instructions; and one or more processors incommunication with the memory and configured to execute thecomputer-executable instructions: a communications interface configuredto receive a first synchronization signal block sent by a networkdevice, wherein the first synchronization signal block comprises a firstphysical broadcast channel (PBCH), and information carried on the firstPBCH comprises first information and second information, and obtainresource information of a second synchronization signal block based onthe second information if the first information indicates that remainingminimum system information (RMSI) is not present; wherein the firstinformation is used for indicating whether RMSI is present, and when thefirst information indicates that RMSI is not present, the secondinformation is used for indicating the resource information of thesecond synchronization signal block.
 16. The device of claim 15, whereinthe first PBCH comprises a first field, the first field is used forcarrying the second information; and, wherein a second PBCH comprises asecond field, the second field is the same field as the first field, andthe second field is used for carrying fourth information.
 17. The deviceof claim 15, wherein the first field in the first PBCH used for carryingthe first information is the same field as the second field in thesecond PBCH used for carrying third information.
 18. The device of claim15, wherein the communications interface is further configured to:receive the second synchronization signal block according to theresource information of the second synchronization signal block, whereinthe second synchronization signal block comprises a second PBCH,information carried on the second PBCH comprises third information andfourth information, wherein the third information is used for indicatingwhether RMSI is present, and when the third information indicates thatRMSI is present, the fourth information is used for indicating aresource set carrying control information for receiving the RMSI. 19.The device of claim 18, wherein a first bit field for carrying thesecond information and a second bit field for carrying the fourthinformation at least partially overlap.
 20. The device of claim 18,wherein, if the third information indicates that RMSI is present, thecommunications interface is further configured to obtain RMSI accordingto the fourth information.
 21. The device of claim 20, wherein thecommunications interface is specifically configured to: obtain,scheduling information of a physical downlink shared channel (PDSCH), bymonitoring a physical downlink control channel (PDCCH) according to theresource set indicated by the fourth information; and obtain, accordingto the scheduling information of the PDSCH, RMSI carried on the PDSCH.22. The device of claim 15, wherein the resource information of thesecond synchronization signal block is frequency resource positioninformation of the second synchronization signal block or frequencylocation offset information between the second synchronization signalblock and the first synchronization signal block.
 23. The device ofclaim 15, wherein the RMSI comprises at least one of the following: apaging configuration parameter, cell selection information, or accesscontrol information.
 24. An information transmission device comprising:a memory configured to store computer-executable instructions; and oneor more processors in communication with the memory; and acommunications interface configured to send a first synchronizationsignal block to a terminal device, wherein the first synchronizationsignal block comprises a first physical broadcast channel (PBCH),information carried on the first PBCH comprises first information andsecond information, wherein the first information is used for indicatingwhether remaining minimum system information (RMSI) is present, and whenthe first information indicates that RMSI is not present, the secondinformation is used for indicating resource information of a secondsynchronization signal block.
 25. The device of claim 24, wherein thesecond synchronization signal block comprises a second physicalbroadcast channel PBCH, information carried on the second PBCH comprisesthird information and fourth information, the third information is usedfor indicating whether RMSI is present, and when the third informationindicates that RMSI is present, the fourth information is used forindicating a resource set carrying control information for receivingRMSI.
 26. The device of claim 25, wherein a first bit field for carryingthe second information and a second bit field for carrying the fourthinformation at least partially overlap.
 27. The device of claim 24,wherein the resource information of the second synchronization signalblock is frequency-domain resource position information of the secondsynchronization signal block or offset information between the secondsynchronization signal block and the first synchronization signal block.28. The device of claim 24, wherein the RMSI comprises at least one ofthe following: a paging configuration parameter, cell selectioninformation, or access control information.